I can't access certain filter menus - why?

[junglist]

I'm working on a large file in PS 4, and I can't access the following filter menus: Artistic, Brushstrokes, sketch, texture and video.

My file is quite large (450 MB), and I could access these filter menus when I was working on a lo-res version of the same image.

Does Photoshop prvent you from selecting certain menus when a file is exceptionally large?

Does anyone know why this is happening?

 

[junglist]

OK, it seems to be that you just cant access tho filters in CMYK, wheras they can be accessed in RGB.

Nontheless this is a pain. Is there some way aournd this, so I can utilise those filters in CMYK mode?

Thanks.

 

[aikodude]

you can switch via image> mode to rgb, apply your filters, then switch back...

 

[junglist]

Yeah, but that technique flattens the image, which I don't want to do at this point.

 

[aikodude]

ah.. didn't realize that. do you need to apply it to the whole image? can you copy one (or several merged) layers to a new file and apply the filters then copy the merged result back? maybe blending it somehow?

 

[junglist]

Yeah, that's the conclusion I've come too as well.

Pity there is not a faster way of doing it.